Model/Menu/Menu.cs - master - Vagabond132/TerrariaCourse

Model/Menu/Menu.cs
97 строк3 KB
Vagabond132
update
11 янв 2025, 07:11
11 янв 2025, 07:11a9f164f
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Model.Menu
{
  /// <summary>
  /// Подменю
  /// </summary>
  public class Menu : SubMenuItem
  {
    /// <summary>
    /// Необходима ли перерисовка
    /// </summary>
    public delegate void dNeedRedraw();
    /// <summary>
    /// Событие перерисовки
    /// </summary>
    public event dNeedRedraw NeedRedraw = null;
    /// <summary>
    /// Сфокусированный элемент
    /// </summary>
    private int _focusedItemIndex = -1;
    /// <summary>
    /// Индекс сфкусированного элемента
    /// </summary>
    public int FocusedItemIndex
    {
      get { return _focusedItemIndex; }
      protected set { _focusedItemIndex = value; }
    }
    /// <summary>
    /// Конструктор
    /// </summary>
    /// <param name="parName"></param>
    public Menu(string parName) : base(0, parName)
    {

    }
    /// <summary>
    /// Сфокусироваться на следующем
    /// </summary>
    public void FocusNext()
    {
      int savFocusedIndex = _focusedItemIndex;
      if (_focusedItemIndex == Items.Length - 1)
        _focusedItemIndex = 0;
      else
        _focusedItemIndex++;

      Items[_focusedItemIndex].State = States.Focused;
      Items[savFocusedIndex].State = States.Normal;

      NeedRedraw?.Invoke();
    }
    /// <summary>
    /// Сфокусироваться на предыдущем
    /// </summary>
    public void FocusPrevious()
    {
      int savFocusedIndex = _focusedItemIndex;
      if (_focusedItemIndex == 0)
        _focusedItemIndex = Items.Length - 1;
      else
        _focusedItemIndex--;

      Items[_focusedItemIndex].State = States.Focused;
      Items[savFocusedIndex].State = States.Normal;

      NeedRedraw?.Invoke();
    }
    /// <summary>
    /// Сфокусироваться по индексу
    /// </summary>
    /// <param name="parId">индекс</param>
    public void FocusItemById(int parId)
    {
      int savFocusedIndex = _focusedItemIndex;
      MenuItem menuItem = this[parId];
      _focusedItemIndex = new List<MenuItem>(Items).IndexOf(menuItem);

      if (savFocusedIndex != -1)
        Items[savFocusedIndex].State = States.Normal;
      Items[_focusedItemIndex].State = States.Focused;
      NeedRedraw?.Invoke();
    }
    /// <summary>
    /// Выбрать сфокусированный элемент
    /// </summary>
    public void SelectFocusedItem()
    {
      Items[_focusedItemIndex].State = States.Selected;
    }
  }
}